Undercoat Paint

Undercoat paint can provide a layer of protection and make the surface more adhesive prior to applying the main coat.
Please note that this shouldn’t be applied to new surfaces, you should only use it if you have previously covered the surface with primer or paint. It’s best to use the same colour undercoat as your main coat.
The professional solutions are easy to apply and guarantee excellent opacity. There are water and solvent options available.